class VideoProcessingError(Exception):
    """视频处理基础错误类"""
    pass

class VideoEncodingError(VideoProcessingError):
    """视频编码错误"""
    pass

class ModelCallError(VideoProcessingError):
    """模型调用错误"""
    pass

class FileValidationError(VideoProcessingError):
    """文件验证错误"""
    pass

class ConfigurationError(VideoProcessingError):
    """配置错误"""
    pass 